Pressure-reducing valve.



N0. 829,444. PATENTED AUG. 28, 1906:

M. TOLTZ @L P, T. KITCHEN,

PRESSURE RBDUING VALVE. urmoulon funn Nomea, 1902.

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MAX TOLTZ AND FREDERICK T. KITCHEN, OF ST.

PAUL, MINNESOTA.

PRESSURE-REDUCING VALVE..v

Specification of Letters Patent.

Patented Aug. 28, 1906.

Application filed November 28, 1902. Serial No. 133,023.

To all whom it may concern.-

Be it known that we, MAX i TOLTZ and FREDERICK T. KITGHEN, residents ofSt. Paul, county of Ramsey, State of Minnesota, have invented certainnew and useful Improvements in Pressure-Reducing Valves, of which thefollowing is a specification.

Our invention relates to reducing-valves or gas-regulators, with specialreference to reducing-valves that are adapted for employment inacetylene-gas systems.

The object of our invention is to provide a reducing-valve of simple andcheap construction which shall have few working parts and which willoperate reliably and accurately.

The particular object of the invention is to i improve the constructionof spring-resisted spring resisting the movement reducing-valves orregulators.

The invention primarily consists in a gas pot or chamber having alow-pressure outlet, in combination with a. valve-casing and valvecommunicating therewith and whereto the high-pressure pipe is connected,a diaphragm operable by the pressure of gas Within said vpot or chamber,a lvalve-actuating lever connected with said diaphragm, and a thereof;and our invention consists, further, in the oombination of thespring-resisted valve-actuating lever and an operating diaphragm orpiston with a toggle-lever connected between said lever and diaphragm,all in a reducing-valve substantially as hereinafter described, andparticularly pointed out in the claims.

The invention will be more readily understood by reference to theaccompanying drawings, forming a part of this specification, and inwhich* Figure 1 is a vertical section of a reducingvalve orgas-regulator embodying our invention. Fig. 2 is a horizontal sectionthereof on the line of Fig. 1, and Fig. 3 is a detail of thevalve-actuating lever.

As shown in the drawings, 2 represents the valve pot or chamber provided-with the large top 3, in which the diaphragm 4 is arranged. Saiddiaphragm 4 closes the top of the pot and is held by a ring 5. The topof the pot or chamber is additionally closed by the plate 6 which alsoserves as a stop for the diaphragm in case the pressure of the gas-nection between the regulator and the within the pot is so great as toflex the connected levers.

7 is the center button or metallic fastening of the diaphragm, which isconnected to the toggle-levers 8 and 9 by the pivotal link 10. The lever9 is pivoted on the lug or block 11 within the chamber, while theopposite end of the lever 8 is pivoted in the upper end of thevalve-actuating lever 12. To avoid the results of expansion andcontraction, this lever 12 is pivoted on the lug 13 of the valvecasing14, and it operates the pin or plunger valve 15, which is slidable insaid casing 14. The lever 12, as shown, is preferably made in two parts,which straddle the lug 13 and also straddle the square end 15 of thevalve 15. The valve carries the pin 15, and the lever 12 is providedwith a short slot 12 to permit freedom of movement between the lever andvalve.

16 is a swivel-head pivoted by pin 16 between the parts of the lever 12.The eye is preferably swiveled in the head 16, and to it is connectedthe resisting tension-spring 17. The opposite end of the spring isattached to the swivel-eye 18', provided on the end of theadjusting-screw 18 that is threaded in the wall of the chamber 2 andwhereof 19 is the locking-nut. By turning the screw the tension of thespring 17 may be adjusted as required to govern the inflow ofhigh-pressure gas through the valve-casing. The valvecasing, as shown,is preferably a cylindrical sleeve that extends through a tightcylindrical bearing 20, provided therefor in the lug or boss 2', that isintegral with the walls of the pot or chamber 2. This boss is extendedon the exterior of the chamber to afford a flat seat 21 for the T-head14 of the valve-casing. 22 represents a fusible cross-piece or blockthat is seated on the outer end of the valve-casing, both parts beingheld by the screws 23 23, that extend into the external boss on the pot.The high-pressure pipe 24 is screwed into the block 22 and the joint ismade tight by the lock-nut 25. The pot or chamber is of iron, while theblock 22 is made of a metal which is fusible at a low temperature, suchas lead, whereby the conhighpressure pipe is opened in case of aconilagration. This is of particular value when the IOO pin point of thevalve 15.

as indicated in Fig. 1.

27 is the gas-valve opening, having a small l conical seat at its innerend for the conical or The valve is preferably grooved longitudinallyAfor the discharge of gas `from the casing into the large pot or chamber2.

29 represents the low-pressure gas-outlet of the regulator, from whichthe gas is conducted for use, as tothe gas-burner pipes and burners.

The operation of our novel regulatingvvalve is as follows: The gas visadmitted through the pipe 241 at 'a high pressure, varying according tothe service to be performed or the pressure remaining in the service orstorage tank from which the pipe extends. In passing through thestrainer or iilter within the valve-chamber the gas is relieved vfromall particles that might clog the small valve-aperture 27. Assuming thatthe pot oi chamber is at this moment free from pressure, 'with itsdiaphragmdepressed by gravity, the high-pressure gas will freely passthe open valve and quickly 'fill the valve-pot, being re- Aduced inpressure by expansion into the larger chamber. The slightest pressureexerted upon the diaphragm from within the chamber will cause thediaphragm to rise and to carry with it the connecting-pivot of thetoggle-levers 8 and 9.

A sudden rush of gas into the empty pot will thus straigl'iten thetoggle, move the lever 12, and close the valve 15 against the tension ofthe spring 17 and the weight of the diaphragm and connected parts. Thevalve will be held closed until the pressure of gas Within the pot isrelieved at the outlet 29. As the gas is relieved the diaphragm and thetoggle-center will fall, thus shortening the distance between the endsof the toggle-levers S and 9 and slightly opening the inletvalve,through which gas will be admitted to maintain an unvarying pressure inthe pot. The pressure wi thin the pot is covered by the ten sion of thespring 17, by the adjustment of which any desired pressure reduction maybe secured.

The special feature of our invention is the toggle-lever, by means ofwhich the leverage upon the valve is made toy increase in exactproportion to the increase of spring tension when the spring isdistended by the rising diaphragm. It is obvious that the leverage ofthe diaphragm upon the valve-actuating le'- ver decreases vaccuratelyand regularly when and as the spring is allowed to contract.

In addition to the foregoing our regulatingvalve possesses theadvantages of simplicity and low cest compared with the devices now onthe market and adapted Vfor like service.

It is obvious that numerous modifications of our invention will readilysuggest themselves to one skilled in the art, 4and we therefore do notconfine our invention to the specilic constructions herein shown anddescribed.

I-Iaving thus described our invention, We claim as new and desire tosecure by Letters Patent- 1. In a pressure-regulator, a valve-potcovered by a diaphragm and provided with a suitable gas-outlet an d ahigh-pressure inlet, a bearing extending :into said pot, a valvecasingslidable in said. bearing and removable from the outside of said pot,means for securing said casing, a high-pressure pipe, a fusible blockconnection betweensaid high-pressure pipe and said valve-casing, a valvein said casing, and an actuating connection between said valve and saiddiaphragm, substantially as described.

2. In a pressure regulator, a valve-pot having a suitable outlet, ahigh-pressure inlet near the bottom of said pot comprising avalve-casing extending into saidv pot and removable from the outsidethereof, a valve in said casing, a high-pressure pipe, and a fusibleblock connection between said pipe and said valve-casing, in combinationwith an automatic valve-operating mechanism in said pot, substantiallyas described.

3. In a pressure-rediicing valve, the combination, of a valve-pot havinga gas-outlet, with a diaphragm, a valve-casing provided in said pot andremovable Vfrom the exterior thereof, a high-pressure pipe, a 'fusibleblock connection between said pipe and valve-casing, a valve provided insaid casing, a valveresisting spring, and an actuating connectionbetween said valve and said diaphragm, substantially as described.

4. The regulating-valve comprising a valvepot having'a suitable outlet,a high-pressure inlet and an automatic valve-operating mechanism in saidpot, in. combination, with the high-pressure pipe and a Afusible valveconnection on said pot, Vfor said pipe, substantially as described.

5. In a pressure-regni ating valve, a valvepot, 2, provided with a wideflange, 3, the diaphragm., 1, attached thereto and having an-outlet-valve, in combination with a circular boss, 2/, a valve-casing,14, circular in crossseetion, slidable in a tight bearing, 20, andextending into and nearly across the pot, 2, at or near its lowestportions, to close proximity with the opposite side of said pot, saidIOO IOS

IIO

1902, at St. Paal, county of Ramsey, and State of Minnesota.

valve-casing containing a pin-valve, 15, and carrying a lug, 13, and anactuating connection within said pot between said da hragm MAX TOLTZ.and said valve-casing and above said) valve- FREDERICK T. KITCHEN. 5easing7 substantially as described. Witnesses:

In testimony whereof We have hereunto C. U. TUBBY, set our hands7 this24th day of November, R. D. IIAWKINS.

